Hi frnds.. i'm doing final year project of "IVR Board". so i'm using phillips P89v51rd2 microcontroller and SIM 300 GSM module. i've finished all the hardware parts and it is working fine.. but i'm not getting how to write code to interface GSM..
i've written sample program to send AT to GSM. It is working fine. but i'm not getting how to write the code to receive the commands from GSM..
when i send AT to GSM, the GSM will send OK.. But i dnt know how to receive that OK and where to save it..